In a fission reaction,

U92236X117+Y117+n+n

the binding energy per nucleon of X and Y is 8.5 MeV whereas of U236 is 7.6 MeV. The total energy liberated will be about [1997]

(1) 2000 MeV          (2) 200 MeV               (3) 2 MeV            (4) 1 keV

Concept Questions :-

Nuclear binding energy
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A nuclear reaction along with the masses of the particle taking part in it is as follows;

   A  +  B    C  +  D  +  Q MeV1.002  1.004   1.001  1.003amu     amu     amu   amu

The energy Q liberated in the reaction is

(1) 1.234 MeV                         (2) 0.931 MeV

(3) 0.465 MeV                         (4) 1.862 MeV

Concept Questions :-

Mass-energy equivalent
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A nuclear decay is expressed as 

C116B115+β++X

Then the unknown particle X is:

(1) Neutron          (2) antineutrino             (3) proton               (4) neutrino

Concept Questions :-

Types of decay
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mp denotes the mass of a proton and  mn that of a neutron. A given nucleus of binding energy BE, contains Z protons and N neutrons. The mass m (N, Z) of the nucleus is given by [2004]

(1) m(N, Z) = Nmn+Zmp- BEc2

(2) m(N, Z) = Nmn + Zmp + BEc2

(3) m(N, Z) = Nmn + Zmp - BE / c2

(4) m(N, Z) = Nmn + Zmp + BE / c2

Concept Questions :-

Nuclear binding energy
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When a deuterium is bombarded on O168 nucleus, an α-particle is emitted, then the product nucleus is [2002]

(1) N137          (2) B105              (3) B4e9                 (4) N147

Concept Questions :-

Types of decay
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A nuclear reaction given by  XAzYAz+1+e0-1+ν¯ represents  [2003]

(1) fusion         (2) fission           (3) β-decay         (4) γ-decay

Concept Questions :-

Types of decay
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The mass of N157 is 15.00011 amu, mass of O168 is 15.99492 amu and mp= 1.00783 amu. Determine binding energy of the last proton of O168

(1) 2.13 MeV          (2) 0.13 MeV           (3) 10 MeV               (4) 12.13 MeV

Concept Questions :-

Nuclear binding energy
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The rate of disintegration of a fixed quantity of a radioactive substance can be increased by

(1) increasing the temperature

(2) increasing the pressure

(3) chemical reaction

(4) it is not possible 

Concept Questions :-

Radioactivity
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The energy released by the fission of one  uranium atom is 200 MeV. The number of fission per second required to produce 3.2 W of power is (Take, 1 eV = 1.6×10-19 J) [WB JEE 2010]

(1) 107           (2) 1010         (3) 1015          (4) 1011

Concept Questions :-

Nuclear binding energy
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The power obtained in a reactor using U235 disintegration is 1000 kW. The mass decay of U235 per hour is

(1) 1 microgram           

(2) 10 microgram       

(3) 20 microgram     

 (4) 40 microgram

Concept Questions :-

Mass-energy equivalent
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